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CVE-2026-58595: Microsoft Bing App for IOS Spoofing Vulnerability

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-14 · updated 2026-10-28
• Weakness: CWE-1021

Description

Improper restriction of rendered ui layers or frames in Microsoft Bing App for IOS allows an unauthorized attacker to perform spoofing over a network.

Affected products

• Microsoft Bing Search for iOS: before 33.4.440529002 — fixed in 33.4.440529002
• Microsoft Bing Search for iOS: from 1.0 before 33.4.440529002 — fixed in 33.4.440529002

How to fix

Upgrade to a fixed version: Microsoft Bing Search for iOS 33.4.440529002; Microsoft Bing Search for iOS 33.4.440529002. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58595

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